All concepts included in Wikipathway enpoint

Statement: 
Display all concepts included in Wikipathway enpoint
Limit of results per page $number$ (e.g.100)
Query: 
prefix wp: <http://vocabularies.wikipathways.org/wp#> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> prefix dcterms: <http://purl.org/dc/terms/> select distinct ?concept ?label ?source where { ?concept ?p <http://www.w3.org/2004/02/skos/core#Concept> . OPTIONAL{ ?concept <http://www.w3.org/2000/01/rdf-schema#label> ?label . ?concept<http://purl.org/dc/elements/1.1/source> ?source . } } limit ??number